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Table 7 Predictive parameters of the various Body Functions score cut-offs for different SaO2 nadir levels

From: Performance of brief ICF-sleep disorders and obesity core set in obstructive sleep apnea patients

Cut-off points Sensitivity Specificity PPV NPV AUC
SaO2 ≤ 90% as the diagnostic criteria for OSA Prevalence of OSA = 509/592 (85.98%)
 ICF-Sleep≥2 0.91 0.25 0.89 0.30 0.58 (0.52–0.63)
 ICF-Sleep≥3 0.59 0.39 0.86 0.13 0.63 (0.57–0.70)
 ICF-Sleep≥4 0.56 0.70 0.92 0.20 0.63 (0.57–0.70)
 ICF-Obesity≥1 0.98 0.10 0.88 0.46 0.54 (0.50–0.58)
 ICF-Obesity≥2 0.82 0.34 0.89 0.23 0.58 (0.52–0.65)
 ICF-Obesity≥3 0.51 0.62 0.90 0.17 0.57 (0.50–0.63)
SaO2 < 85% as the diagnostic criteria for OSA Prevalence of OSA = 337/592 (56.93%)
 ICF-Sleep≥3 0.82 0.45 0.67 0.65 0.63 (0.59–0.68)
 ICF-Sleep≥4 0.67 0.66 0.72 0.59 0.66 (0.62–0.71)
 ICF-Sleep≥5 0.47 0.81 0.77 0.53 0.64 (0.60–0.68)
 ICF-Obesity≥1 0.99 0.06 0.59 0.85 0.52 (0.51–0.54)
 ICF-Obesity≥2 0.87 0.29 0.62 0.62 0.58 (0.54–0.62)
 ICF-Obesity≥3 0.54 0.57 0.63 0.48 0.55 (0.51–0.60)
SAO2 < 80% as the diagnostic criteria for OSA Prevalence of OSA =234 /592 (39.53%)
 ICF-Sleep≥3 0.84 0.74 0.81 0.77 0.61 (0.57–0.65)
 ICF-Sleep≥4 0.71 0.59 0.54 0.75 0.65 (0.61–0.70)
 ICF-Sleep≥5 0.50 0.75 0.58 0.69 0.63 (0.58–0.67)
 ICF-Obesity≥2 0.88 0.25 0.44 0.76 0.57 (0.53–0.60)
 ICF-Obesity≥3 0.59 0.58 0.48 0.68 0.58 (0.54–0.63)
 ICF-Obesity≥4 0.27 0.82 0.50 0.63 0.54 (0.50–0.58)
  1. PPV positive predictive value, NPV negative predictive value, AUC the area under the curve